Depth of field. Range of distances where objects appear acceptabliy sharp. See:


Standard that specifies how metadata is incorporated into image files. See:

grey card

A piece of cardboard that is exactly 18% reflecting neutral grey. See:

color reference chart

A card that has many different color samples on it. See:

PC Sync

A standard connector used in photography to synchronize the flash to the shutter. See:


RAW image file format. A file format that contains the unprocessed values read from the camera sensor. See: